Prep/Master 4438LP Propane

Propane - for Projects up to 20,000 SF/1,858 m2

Prep/Master® 4438LP (Propane Model)

Ideal for Polishing Projects up to 20,000 SF/ 1,858 M2

The STI-4438LP Propane machine has the same strong design as the model STI-4430, but is powered by a 38HP Kawasaki propane motor. Quite unexpectedly for its weight and size, this grinder is extremely easy to operate due to the smooth operation of the STI rotary gear system.

It features a movable pocket weight system for multiple applications and is recommended for projects up to 20,000 SF (1858 m2). Its variable speed drive easily adapts to different grinding or polishing conditions for concrete, terrazzo, marble, and stone applications. Available in 230V or 480V. Uses eight tool plates (included).

Item #434438001

Motor Motor Kawasaki 38HP LP
Motor RPM
2,200 - 3,650 RPM
Weight 1,315lbs | 596kg
Dimensions 78"L x 44"W x 50"H
198cm x 112cm x 127cm
Tools Needed 24
Tools RPM 366RPM to 500RPM
Tools Attachment Style EG Proprietary Attachment System
Vacuum Hose Connection 3 in. (76mm) (sold separately)
Recommended Vacuum Duo Vac (630CFM) with pre-separator or equivalent

Production Rates
Mastic Removal 725 SF /53 M2 per hour
Thin Set Removal 725 SF /53 M2 per hour
+/-25 Mil Coatings 575 SF /53 M2 per hour
Concrete Polishing 5,025 SF /467 M2 per hour

4438LP Machine Manual
Download Machine Manual
4438LP Sales Flyer
More Information
Don't Forget Your Repair Kit for Emergencies!
Repair Kits for Emergencies

How to Properly Start a Propane-powered Machine


Proper Maintenance of a Propane-powered Machine


Maintenance Procedure for Propane-powered Machines